At least 15 people are dead and 30 others wounded after a string of explosions rocked Baghdad, police and hospital officials said Sunday.

In the city center a car bomb killed 10 and wounded 21. After nightfall, another explosion hit the area, killing two and wounding five. The third went off near a falafel shop in the city’s sprawling Sadr City district, killing three and wounding seven, the Associated Press reported.

No one immediately took responsibility for the bombings.

The Islamic State of Iraq and the Levant, or ISIL, a predominantly Sunni militant group with ties to al Qaeda, captured a vast swath of northern Iraq last week, including second-largest city Mosul and Saddam Hussein’s hometown of Tikrit.

The group posted graphic photos on a militant website that appeared to show its fighters massacring dozens of captured Iraqi soldiers, the Associated Press reported.